Update the permissions comment to explain what's going on. Stick with
changing the ownership of the mumble data directory because it's slightly
less gross than fully opening permissions of the folder.
Refs: #620
Add the expected molecule files as well as the readme for the role.
Attempt to change permissions to the uid/gid used inside the Mumble
container for the data directory.
Refs: #620
The mumble docker image has the uid and gid baked in at image creation.
In order for the application in the container to write to the mounted volume
we're opening permissions to the mumble data directory.
Refs: #620
The data directory does not have permissions for access, so attempt
to widen those permissions. Additionally, add the role if enabled, and
add conditional to nomad role.
Refs: 620
